Relationships between lead-induced learning and memory impairments and gut microbiota disturbance in mice / 中华劳动卫生职业病杂志

Objective: To explore the effect of lead exposure on the neurobehavior and gut microbiota community structure in mice. Methods: In August 2019, 64 C57BL/6 mice were randomly divided into 4 groups: control group (0 ppm) , low lead exposure group (20 mg/l) , medium lead exposure group (100 mg/l) and high lead exposure group (500 mg/l) . During the experiment, they were free to eat and drink. The drinking water of the lead exposure group was mixed with lead acetate, and sodium acetate was added in the control group. After 10 weeks of exposure, the Morris water maze was used to test the learning and memory ability of each group of mice, and then they were sacrificed for sampling. ICP-MS was used to detect lead content in whole blood and brain tissue. ELISA was used to determine the level of IL-1β in mouse serum. 16S rRNA sequencing was used to detect the structural diversity of the intestinal flora in feces, and then the correlation between the flora and behavior indicators was analyzed. Results: In the Morris water maze experiment, compared with the control group, there was no significant difference in the body weight and swimming speed of the mice in the lead exposure groups. The escape latency of the mice in the 100 mg/l and 500 mg/l dose groups was prolonged, and the number of platform crossings decreased (P<0.05) ; meanwhile, the staying time of the mice in the 500 mg/l Pb-treated group in the target quadrant was lower than that of the control group, and the difference was statistically significant (P<0.05) . Compared with the control group, the blood lead content of the mice in each lead exposure group was significantly increased, and the brain lead content of mice in the 500 mg/l dose group was significantly elevated (P<0.05) . The serum IL-1β levels of mice in each lead exposure group were higher than those of the control group (P<0.05) . At the phylum level, the relative abundance of the Proteobacteria phylum in all of Pb-treated groups was significantly increased (P<0.05) ; at the genus level, Allobaculum, Desulfovibrio, Lachnospiraceae_NK4A136_group, Turicibacter and Ureaplasma were significantly increased (P<0.05) . Among them. The relative abundance of Desuffaoibrio, Turici bacter, and Ureaplasma was negatively correlated with the residence time of mice in the quadrant of the platform (r=-0.32, -0.29, -0.44, P<0.05) . Conclusion: Lead exposure induced learning and memory impairments in mice, which may be related to the disturbance of the gut microbiota.

Effect of HSPB9 on Apoptosis of DF-1 Cells / 生物医学与环境科学（英文）

OBJECTIVE@#Our aim was to explore whether heat stress protein (HSP) 9 preferentially expresses under heat stress and affects the expression of other heat stress proteins as well as to explore the effect of HSPB9 overexpression and knockdown on apoptosis in DF-1.@*METHODS@#We used gene cloning to construct an overexpression vector of the target gene, and synthesized the target gene interference fragment to transfect the chicken fibroblast cell line. Gene and protein expression, as well as apoptosis, were detected by RT-qPCR, Western blot, and flow cytometry.@*RESULTS@#Chicken DF-1 cells showed an early state of apoptosis in the early stages of HSPB9 overexpression. In the later stages, as HSPB9 expression increased, the cells showed inhibition of apoptosis. When the cells were under heat stress, HSPB9 expression was much higher and earlier than the expression of HSPB1 and HSPA2. In addition, high expression of HSPB9 had a negative effect on HSPB1 and HSPA2 expression. This negative feedback decreased the percentage of early stages of apoptotic cells and promoted cell survival.@*CONCLUSION@#HSPB9 expression, although rapid, is detrimental to cell survival early during its overexpression. In heat stress, HSPB9 overexpression, while inhibiting the expression of HSPA2 and HSPB1, is beneficial to cell survival.

Blood pressure levels of 2438 Hasakh children in the Yili region of Xinjiang Province / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To study blood pressure levels, the prevalence of hypertension and factors associated with the development of hypertension in Hasakh children in the Yili region of Xinjiang Province.</p><p><b>METHODS</b>A total of 2438 Hasakh school children from the Yili region of Xinjiang Province were sampled by stratified random cluster sampling method between May and June 2009. Height, weight, waist circumference, hip circumference, skinfold thickness and blood pressure were measured. Body mass index (BMI) was calculated.</p><p><b>RESULTS</b>Mean systolic blood pressure (SBP) and diastolic blood pressure (DBP) were 94±13 mm Hg and 60±9 mm Hg respectively in the 2438 children, and both averages were lower than in the Han children. Hypertension was noted in 138 children (5.66%). The prevalence of hypertension in girls (6.97%, 84/1206) was higher than in boys (4.38%, 54/1232) (P<0.05). The prevalence of hypertension and blood pressone were positively correlated with BMI, waist circumference, hip circumference, skinfold thickness circumference, gender and age.</p><p><b>CONCLUSIONS</b>Average blood pressure levels in Hasakh children in the Yili region of Xinjiang Province are lower than in domestic age-matched Han children. The prevalence of hypertension in girls is higher than in boys. Obesity is highly correlated with the development of hypertension.</p>

Correlation between obesity index and blood pressure in Kazak childhood from Yili, Xinjiang / 中华流行病学杂志

Objective To investigate the correlations between obesity index such as waist circumference,hip circumference,skin-fold thickness,body mass index,waist to hip ratio,waist to height ratio etc,and blood pressure among Kazak children living in Yili of Xinjiang.Methods In May-June 2009,2438 Kazak children aged 7 to 14 at primary schools in Yili of Xinjiang,were investigated.Waist circumference,hip circumference,skin-fold thickness,systolic and diastolic blood pressure were measured to calculate the body mass index,waist to hip ratio and waist to height ratio.Analysis on the differences in age and gender,blood pressure (BP) between hypertensive or normal BP group under the standard set for children.SPSS 17.0 software was used for statistical analysis on its correlation.Results The total prevalence of hypertension was 5.7％ in Kazak ethnic school-age children in Yili,with 4.4％ in the boys and 7.0％ in girls.Data from waist circumference,hip circumference,waist-height-ratio,waist-hip ratio,systolic and diastolic blood pressure showed gender and age differences (P=0.000).Average systolic blood pressure was correlated to waist circumference,hip circumference,skin-fold thickness,body mass index and waist to hip ratio (P=0.000),with hip circumference the most (man:r=0.618,female:r=0.655).The average diastolic blood pressure was correlated to waist circumference,hip circumference,skin-fold thickness,body mass index and waist to hip ratio (P=0.000),with hip having the strongest relation (r=0.489 for male and r=0.548 for females).Significant differences were seen between Hypertension groupand normal blood pressure group on waist circumference,hip circumference,skin-fold thickness,body mass index and waist-hip ratio (P＜0.05).Conclusion In Yili of Xinjiang,the prevalence of hypertension was at the low level in Kazak ethnic school-aged children when comparing to data from national and foreign standards.Indicators related to obesity as waist circumference,hip circumference,body mass index and waist to hip ratio were positively correlated with blood pressure,with hip in particular.

Childhood benign acanthosis nigricans and metabolic abnormality / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To observe the relationship of childhood benign acanthosis nigricans to anthropometric and metabolic indexes, with the aim of studying the association between childhood benign acanthosis nigricans and metabolic diseases.</p><p><b>METHODS</b>A retrospective analysis was performed on the clinical data of 29 children who presented with benign acanthosis nigricans between February 2007 and October 2011. Thirty-two age, sex- and ethnic-matched normal children were selected as control group. The two groups were compared according to obesity (body mass index, waist-to-hip ratio, body fat content and body fat percentage) and metabolic indexes (blood glucose, insulin level and blood lipids).</p><p><b>RESULTS</b>Body mass index, body fat content, body fat percentage, waist-to-hip ratio, fasting blood glucose, insulin level and triglyceride in the 29 patients with benign acanthosis nigricans were higher than in the control group (P<0.05), but the level of high-density lipoprotein in the 29 patients was lower than in the control group (P<0.05). Of the 29 patients, 16 had impaired glucose tolerance and 3 were diagnosed with diabetes (1 case with type 1, two cases with type 2).</p><p><b>CONCLUSIONS</b>Childhood benign acanthosis nigricans is closely associated with obesity, insulin resistance and dyslipidemia.</p>

Over 55 years-old live-related donor kidney transplants: a report of 12 cases / 中华外科杂志

<p><b>OBJECTIVE</b>To evaluate the risk factors of the over 55-year-old donor and the safety and efficacy of the donor, and the recipient with the immediate and long-term of the kidney.</p><p><b>METHODS</b>The living-related donor kidney transplantation in 15 cases was performed in our unit from October 1999 to April 2002. Of these, 12 donors were over 55 with age ranging from 55 to 73 years-old and mean age of 62, 75 years. 5 donors were male and 7 were female. Father in 5 cases and 6 and 1 were mother and grandmother, respectively. The donors were evaluated depending on general state of health, hypertension, diabate and important organa in condition; and renal function by creatinine (Cre), creatinine clearance (Ccr), Glomerular filtration rate (GFR), B ultrasound and renal arteriograph prior to operation. The all receipients with ages ranging from 14 to 46 years with end-stage renal diseases (ESRD) from and their mean age was 32.9 years. The donor' left nephrectomy was performed in 10 cases and right nephrectomy in 2. Warm-ischemia time was from 70 s to 170 s (mean time, 92 s). Cold-ischemia time was from 60 minutes to 120 minutes and mean 84 minutes. The follow-up is from 12 to 42 months and mean 20, 84 months.</p><p><b>RESULTS</b>All the 12 donors were perfectly recovered during operation and postoperation. During their 11-day stay in the hospital no complications was observed. The donor' creatinine was raised to about 12 to 34 micro mol/L (mean, 22 micro mol/L). One recipient died from lung infection at 28 days postoperative and 1 died due to liver failure with normal graft function after transplanted 6 months and yet one recipient with delayed graft function had recovered by 12 times dialysis. The remain recipient had a better recovered.</p><p><b>CONCLUSION</b>Aged (>or= 55 years-old) donor renal transplantation can be carried out as the poor supply of can be used kidney but must to controled the indication and the prepare to be accomplished seriously.</p>